About

Communication ProtocolsMPIMounting TypeDIN RailManufacturer SeriesS7 300SIMATIC S7-300, CPU 313C, Compact CPU with MPI, 24 DI/16 DO, 4 AI, 2 AO, 1 Pt100, 3 high-speed counters (30 kHz), Integr. power supply 24 V DC, work memory 128 KB, Front connector (2x 40-pole) and Micro Memory Card required

General Information

• Product: SIMATIC S7-300, CPU 317-2 DP

• Work Memory: 1 MB (integrated)

• Load Memory: Up to 8 MB via Micro Memory Card (MMC)

• Firmware Version: V3.3

• Programming Software: STEP 7 V5.5+SP1 or V5.2+SP1 or higher with HSP 202

• HW Functional Status: 01

Power Supply

• Rated Voltage: 24 V DC

• Permissible Range: 19.2 – 28.8 V DC

• Current Consumption: 870 mA (rated), 120 mA (no-load)

• Inrush Current: 4 A

• Power Loss: Typ. 4.5 W

• External Protection Recommendation: 2 A minimum

• Mains Buffering / Stored Energy: 5 ms

CPU Processing & Memory

• Processing Times:

  • Bit operations: 0.025 μs

  • Word operations: 0.03 μs

  • Fixed-point arithmetic: 0.04 μs

  • Floating-point arithmetic: 0.16 μs

• CPU Blocks: 2,048 (DBs, FCs, FBs; max size 64 kB each)

• OBs (Organizational Blocks):

  • Free cycle OB: 1 (OB1)

  • Time alarm OBs: 1 (OB10)

  • Delay alarm OBs: 2 (OB20, 21)

  • Cyclic interrupt OBs: 4 (OB32–35)

  • Process alarm OBs: 1 (OB40)

  • DPV1 alarm OBs: 3 (OB55–57)

  • Isochronous OB: 1 (OB61)

  • Startup OB: 1 (OB100)

  • Asynchronous error OBs: 5 (OB80, 82, 85–87)

  • Synchronous error OBs: 2 (OB121, 122)

Counters & Timers

• S7 Counters: 512, adjustable retentivity

• IEC Counters: Unlimited (limited by RAM)

• S7 Timers: 512, adjustable retentivity, range 10 ms – 9,990 s

• IEC Timers: Unlimited (limited by RAM)

Data Areas

• Retentive Data Area: Max 256 kB

• Flags: Max 4,096 bytes, retentive available MB0–MB4095

• Data Blocks: Adjustable retentivity

• Local Data: Max 32,768 bytes per priority class

I/O & Process Image

• Digital Inputs / Outputs: 65,536 total (1,024 central)

• Analog Inputs / Outputs: 4,096 total (256 central)

• Input/Output Address Area: 8,192 bytes each

• Subprocess Images: Max 1

Hardware Configuration

• Expansion Units: Max 3

• DP Masters: 2 integrated, 4 via CP

• FM & CP Recommended: FM 8, CP PtP 8, CP LAN 10

• Racks: Max 4

• Modules per Rack: Max 8

Clock & Time of Day

• Hardware Clock: Yes, retentive and synchronizable

• Backup Time: 6 weeks (at 40 °C)

• Clock Deviation: Max 10 s/day (typ. 2 s/day)

• Operating Hours Counter: 4 counters, range 0 – 2³¹ h, retentive

• Clock Synchronization: Supported via MPI, DP, and AS (Ethernet/NTP not supported)

Interfaces

• RS-485: 2 (combined MPI/PROFIBUS DP)

  • Isolated, max output 200 mA

• PROFINET Interfaces: 0

• Transmission Rate: Max 12 Mbit/s

• MPI / PROFIBUS DP Protocols Supported:

  • MPI, PROFIBUS DP master/slave, S7 communication (server/client), S7 basic communication

  • DPV1 supported on second interface only

  • Max DP devices: 124

Communication & सेवाएं

• PG/OP Communication: Yes

• Global Data Communication: Yes, max 8 loops / 8 packets

• S7 Basic Communication: Supported, max 76 bytes user data per job

• S7 Communication: Server & client via CP, loadable FBs

• S5 Compatible Communication: Supported via CP and loadable FC

• Connections Overall: 32

Diagnostics & Forcing

• Status / Control Variables: Yes, max 30

• Forcing Variables: Yes, max 10

• Diagnostic Buffer: Yes, 500 entries (100 power-fail proof)

Ambient Conditions

• Operating Temperature: 0 – 60 °C

Programming

• Languages: LAD, FBD, STL, SCL, CFC, GRAPH, HiGraph®

• User Program Protection: Password protection & block encryption

Mechanical Data

• Dimensions: 40 × 125 × 130 mm (W × H × D)

• Weight: Approx. 360 g

Technical Details